Grammar in Chomsky Normal form:
E -> int
E -> E E'
E' -> P E
P -> +
dyn prog. parsing of: int+int+int 
E=int 
   

E=int+int
 
   
E=int+(int+int)
   E=(int+int)+int

   
 P=+ 
E'=+int 
  
E'=+(int+int) 
   
   
E=int 
   
E=int+int 
   
   
   
 P=+ 
   E'=+int
 
   
   
   
   
E=int
NB. two possible parses